What's the first thing you do after meeting Michelle Obama? Call your mum, text your dad, go and scream in a corner, right? Well, if you're Jennifer Lopez you go and wiggle your amazing bum in a pap's face. Obviously!

(Image: Getty)

The gorgeous singer was on her way to a Lunch With Jennifer Lopez at New York Hilton Midtown, and the excitement of having a lunch named after her may have caused further buttock-thrusting. We wouldn't know - but we'd be pretty excitable too. Though we'd definitely have insisted there were loads of cakes with our faces on and Den definitely doesn't eat cake.

(Image: Instagram)

Jen had a pretty exciting day, all-in-all - she'd even taken a selfie with Michelle Obama earlier in the day.

In the photo, the pair are smiling widely, and Jen captioned it: "Me and my girl @flotus at #LULAC National convention for the empowerment of Latinos. #represent #keynotespeaker #introingthekeynotespeaker #dreambig." And they look adorable, too.